Ventilator construction



Dec. 5, 1961 Filed Nov. 3, 1958 4 Sheets-Sheet 1 Atorneys Dec. 5, 1961G. M. BREIDERT 3,011,423

VENTILATOR CONSTRUCTION v Filed Nov. 3, 1958 4 Sheets-"Sheet 2 INVENTOR.George M. Breider'r Fig 4,

Atforneys Dec. 5, 1961 G. M. BREIDERT VENTILATOR CONSTRUCTION Filed Nov.3, 1958 Ninn lill" E lm WHW..

INVENTOR. George M. Breider'r BY WW, #um

Dec. 5, 1961 G. M. BREIDERT 3,011,423

VENTILATOR CONSTRUCTION Filed Nov. 5, 1958 4 Sheets-Sheet 4 INVENTOR.

Attorneys 3,011,423 VENTILATGR GNSTRUCTION George M. Breidert, GranadaHills, Calif., assigner to The DG. C. Breidert Co., San Fernando,Calif., a California corporation Filed Nov. 3, 1958, Ser. No. 771,478 4Claims. (Cl. 98-43) This invention has to do with ventilator devicesadapted to be mounted on the roofs of buildings for exhaustingcontaminated air from the buildings.

Roof ventilator devices of conventional construction are usually ofrounded or cylindrical cross section so that, to make them of increasedcapacity, requires that their diameter and height be increased. Suchdevices, being mounted on building roofs, are often exposed to highwinds, so that the height of a ventilator must be kept as low aspossible to prevent damage from such Winds. Also, a shortcoming commonto those prior ventilators, of which I am aware, is that they use motormounts which do not suliiciently damp the vibrations resulting fromoperation of the motor and the motor driven blower or fan, and often donot provide for adequate cooling of the motor. Another difficulty withmost ventilator devices is that they use constructions requiring thattheir parts be produced by metal spinning operations which are rela--tively costly and also they require a large number of Weldingoperations which are costly. Therefore, the aim of those working in theventilator art has long been to overcome those shortcomings anddiiiicuities as far as possible.

It is an object of the present invention to provide a ventilator devicewhich, because ofits construction, is particularly economical ofmanufacture and assembly.

A further object is to provide a ventilator device which is peculiarlyadaptable to being embodied in til rectilinear construction, whichenables the ventilator to be made to have relatively large capacitywithout increasing the Width and height of the device.

Another object is to provide a ventilator having novel and advantageousmotor-mounting means which eiectively clamps vibrations produced byoperation of the motor and blower.

A further object is to'provide a ventilator construction having novelmeans for mounting the baille members.

Another object is to provide, in a ventilatortconstruction, eflicientmeans for cooling the motor employed to operate a booster fan or blowerincorporated in the device.

An additional object is to provide-a combination air inlet or cone andblower wheel assembly which eliminates the necessity of mounting theblower wheel within a scroll member.

A still further object is to provide a ventilator construction which isunusually durable and capableof withstanding exposure to strong winds.`

Other objects and advantages will appear from the ensuing descriptionwherein, by reference to the accompanying drawings, I describe presentlypreferred modes of carrying my invention into practice. However, thedrawings are to be regarded merely as illustrative of said presentlypreferred typical embodiments and it will be understood that variouschanges and modifications may be made without departingfrom the intendedspirit and scope of the invention, as more particularly pointed out inthe appended claims.

In general, I achieve the objects of my invention by making myventilator of rectilinear outline-thatis of squared or rectangular crosssection, having squared corner posts of substantial strength, andvertically spaced bailles or louvers preferably secured at their ends tothe corner posts by ears or tabs inserted through corresponding holes inthe contiguous walls of the corner posts and bent at right angles toretain the parts in assembly. The

3,01 1,423 Patented Dec. 5, 196.1

ICC

motor is carried in an air circulation chamber by a resilientdiaphragmatic plate which forms a cover for the hollow battled orlouvered body, the plate preferably being resiliently supported on thebody. The blower or fan is disposed in the body, being suspended fromSaid plate by means 'of the motor shaft so that it is out of contactwith other parts of the device. Also I provide novel and efcient meansof utilizing the normal air exhausting function of the ventilator tocause air to be drawn into the motor mounting chamber and exhaustedtherefrom by creating reduced pressure at the outlet from the chamber.

From the foregoing description,it will be apparent that the motor is notonly constructed in such a manner that practically all vibrationsresulting from its operation, as well as operation of the blower', areeffectively damped, but also the motor is at all times shielded from theelements and maintained cool by air circulation. Also, lthe constructionis such that the ventilator base, body and hood can be made of metalstampings so that all relatively costly rnetal spinning operations areeliminated. The cooperating ear and slot means'of assembling the devicefurther materially reduces the costs of assembly. The describedconstruction also provides great durability and enables achievinggreater capacity while making the ventilator of less width and heightthan would be necessary in conventional ventilator construction.

air from a building. However, the booster blower is desirable where theexhaust load is heavy or where there are little or no extraneous aircurrents blowing over the ventilator. I Y

In the accompanying drawings:

FIG. 1 is a side elevation with a part being broken away forillustrative purposes;

FIG. 2 is a top plan view;

FIG. 3 is a section taken on line 3-3 of FIG. 2;

FIG. 4 is a section taken on line P4 of FIG. l;

FIG. 5 is a fragmentary perspective view of a corner portion of thedevice; Y

FIG. 6 is an enlarged section taken on line 6-6 of FIG. 5;

FIG. 7 is an enlarged section taken on line 7--7 of FIG.` l; l

FIG. 8 is a plan View of the motor mount;

FIG. 9 is asideelevation, with party broken away, showing a modifiedform of motor and driving arrangement, and

FIG. 10 is a sectional view showing a modied corner construction.v

Referring now tothe drawings (FIGS. 1 8), I show my ventilator ascomprising a square base 5 having a depending marginal flange 6 forfitting over a curb (not Y shown) surrounding an opening in a buildingroof. 'Ihe base has a central opening and carries an inlet cone ring 9in register with the opening. While I show the base as adapted formounting on a ilat roof, it may have its bottom portion shaped to fit onthe ridge of a ridge roof if desired.

Secured to the base 5, I provide a body 15 of squared cross section andtapering from its top to the base. The body includes four corner posts18 with a number (here shown as 3) of superimposed horizontal baffles orvanes, to be described, between and secured to the contiguous cornerposts preferably in the manner to be hereinafter described.

As best shown in FIGS. 5-7, each of the posts 18 is of squared crosssection and is comprised of side Walls 18a, 1811, 18e and 18d. The walls18a, 18b are preferably integral with each other, while walls 18C and18d are preferably separate members and have openings 22 adjacent theirouter side edges for the reception o-f ears 23 formed integral with thecontiguous edges of the walls 18a, 18h; the ears being bent at rightangles against the outer surface of walls 18h, 18C, so as to retain thewalls in assembly. The inner edge portions 19 of walls 18e and 18d havemarginal portions bent at an acute angle and secured together, as bywelding as best shown in FIG. 7, the bottom end portion of each of thewalls ISC, 18d is inwardly iianged at 24 and those flanges are securedto the base, as by screws 24a.

Each of the walls 18e and 18a' has a cut-away portion 25 and a bracket27 is secured, as by screws 26, to the intersecting portions of walls18e and 18d; the bracket having a horizontal top portion 27a to which issecured, as by'means of a bolt 28, carrying a vibration dampingresilient member 29 for the purpose to be described. An L-shaped coverplate 30 is provided for each post, the cover plate having along itsmarginal portions a number of openings 32. to pass ears 33 formedintegral with the top edges of the side walls. The ears are bent atright angles against the top surface ofthe cover plate to secure thecover plate against the top edges of the side wall. Also the cover platepreferably has a depending marginal flange portion 30a.

In FIG. 10, I show a variational corner post construction wherein eachof the corner posts 1S' has its walls 18a, 18h formed integral with eachother and has its walls 13C, 18d formed integral with each other, andthe two wall units are secured together by means of acutely angled sideedge anges 34 welded together.

The sides of the body between the corner posts are each defined by abottom panel 4t), which has a bottom marginal flange 40a secured, as bywelding, to the base 5, and by a plurality of sets of louvers or baffles45a, 45h and 45C, the ends of which bafles have projecting ears 46 whichextend through corresponding openings in the contiguous side walls ofthe posts 18 and being bent over to retain the baffles secured to theposts.

Each of the bafes has a horizontal outer portion 50, an upwardly andinwardly inclining intermediate portion 51 and an upwardly and outwardlyinclining inner portion 52. As best shown in FIG. 3, each of the innerportions 52 of the baffles 45a and 45b terminates in a plane slightlyabove the plane of the bottom surface of the horizontal portion 50 ofthe next upper bafe.

A resilient, diaphragmatic plate 60 is supported at its corner portionson vibration damping elements here shown as rubber pads 29, beingsecured in position thereon by having the bolts 2S project throughcorresponding holes in the plate and being secured by nuts 61 threadedon the bolts. The marginal portions 60a of the plate 60 are disposeddownwardly and outwardly for the purpose to be described.

The motor M is mounted onfthe diaphragmatic plate 60 by a bracket 65described as follows (FIG. 8): The bracket 65 comprises an upright plate66 having a bottom ange 66a secured to plate 60 by screws 67, and theplate 66 is braced by two spaced triangular plates 68 each having abottom tlange 68a secured to the base by screws 68b and having an endflange 68C secured to plate 66 by bolts 68d. The motor is secured to theplate 66 by bracket 69. The motor has its shaft 70 extending through anopening in plate 60 and the shaft carries an air impeller, here shown asa conventional centrifugal blower wheel 71 on its bottom end within thebody 15.

As best shown in FIG. 3, the bottom of the blower wheel 71 has adepending annular ange 72 defining an air inlet to the wheel into whichextends vthe top or outlet end of the cone 9, so that air, is guidedinto the wheel without the necessity of enclosing the blower wheelwithin a conventional scroll.

Secured, by hinges 75, to the corner posts 18 at one side of the body, Iprovide a hood `77 whose side walls 73 converge to the at top wall 79;the side walls having horizontally disposed inlet openings 80 shieldedby portions 81 which are struck out of the side walls and bent outwardlyat an angle thereto.

The hood has a horizontal marginal portion 83 which has a dependingmarginal flange 84 spaced outwardly from the marginal portion 60a ofplate 60, so that as air passes out of the body between the top baiiie45C and flange 60a it will be directed outwardly beneath the marginalflange 84 of the hood and thus create a reduced pressure in thepassageway 85 defined by marginal portions of the plate 60 and the hood.

In the embodiment of FIG. 9 the construction is as before described,except that here the angle iron motorrnounting bracket carries a sleeve92 secured thereto by clamps 93, and a drive shaft 94 is journaled atthe sleeve and carries a pulley 9S at its top end, and also carries aconventional blower device 96 at its bottom end. The motor M is securedto the upright portion of bracket 90 in position laterally offset fromthe shaft 94, and drives the shaft by means of a belt 97.

I claim:

l. In a roof ventilator, arectangular base having a hat top wall and adepending marginal flange, said base being adapted to engage over a curbsurrounding an opening in a roof, a hollow body including four cornerposts secured at their bottom ends to the top wall of said base andextending uprightly therefrom, said posts having outer side walls whichconverge towards said base horizontally disposed louvers secured attheir ends to contiguous ones of said posts and defining the sides ofsaid body, a resilient pad carried by the top end of each of said posts,a diaphragmatic plate overlying the interior of said body and supportedat its corner portions on said pads in position spaced above the topmostof said louvers, said plate having an opening therethrough and havingdownwardly and outwardly disposed marginal portions, a motor supportedon said plate, said motor having a shaft depending through said opening,an air impeller secured to said shaft and disposed within said bodybelow said plate, and a cover hood mounted on said posts and enclosingsaid motor, said hood having a ventilation opening therein.

2. The ventilator of claim 1 wherein the inner marginal portion of eachof said louvers is upwardly and outwardly disposed, wherein the innermarginal portions of the topmost of saidklouvers terminate in inwardlyspaced relationship to the marginal portions of said plate and definetherewith air outlet passageways therebetween, and wherein said hood hasits marginal portions terminating in a plane spaced above the plane ofthe marginal extremity portions of said plate whereby to define airoutlet passageways therebetween exposed to said first mentionedpassageways.

3. In a roof ventilator, a hollow open ended rectangular body havingcorner posts and having horizontal, vertically spaced louvers in itssides secured at their ends to said posts, a cover plate resillientlysupported on the top ends of said posts in covering relationship to thehollow interior of said body, in position spaced above the topmost ofsaid louvers, said plate having a downwardly and outwardly disposedmarginal portion, a hood supported on the top end portions of said postsand overlying said plate and having a ventilation opening therein, saidhood having a depending marginal ange surrounding the top side portionof said body in horizontally spaced relation to the marginal portion ofsaid plate whereby to provide therebetween an air outlet from said hood,and the topmost of said louvers having upwardly and outwardly disposedinner marginal portions spaced inwardly from the marginal edge of saidplate whereby, in cooperation therewith, to deflect air passingoutwardly from the interior of said body in a path extending immediatelybeneath the outlet end of said passageway; a motor mounted on saidplate, an air impeller mounted within said body -between the sidesthereof, and means operativelyjconnecting said motor to said impellei'.

4. In a `roof ventilator, a hollow rectangular body adapted to bemounted in `surrounding relationship to an `air outlet in a buildingroof and having its bottom end in communication with said opening, meanscovering the top end of said body; said body being tapered from its topto its bottom end and having corner post` within said body, and powermeans for rotatingL said"y impeller. jl Wheeler -1 Aug. 6, 1940l GohlIan. 15, 1952 Drechsel June 28, 1955 Solzman Jan. 15,1 1957 -Miller Feb.12, 1957 Rudy Sept. 10, 1957 Jenn Feb. 18, 1958 Knut-son Jan. 13, 1959

